Why my blender will show such an error color in render preview mode?
Thank you all for replying my post, I have already solved this issue by switching (forcing) my graphics card preference in NVIDIA Control Panel to NVIDIA GTX 1060, ( By default is Intel Integrated Card), and the error shown in the picture disappeared right away after i restarted blender. It seems like blender is not compatible with my Integrated Graphics Card, ( or maybe blender cannot run on Integrated gpu at all?) By the way, this error will only show up in Eevee render mode, Cycles is working fine.